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 A027672 Molien series for unitary 16-dimensional full Siegel modular group H_4 of order 48514675507200. 6
 1, 0, 1, 1, 2, 3, 7, 7, 19, 27, 52, 87, 172, 279, 550, 960, 1782, 3183, 5845, 10288, 18508, 32284, 56345, 96473, 164157, 274194, 454518, 741321, 1196924, 1906123, 3003750, 4673470, 7198311, 10959836, 16523847, 24654860, 36447873, 53369530 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 LINKS Ray Chandler, Table of n, a(n) for n = 0..1000 Ray Chandler, Mathematica program G. Nebe, E. M. Rains and N. J. A. Sloane, Self-Dual Codes and Invariant Theory, Springer, Berlin, 2006. M. Oura, The dimension formula for the ring of code polynomials in genus 4, Osaka J. Math. 34 (1997), 53-72. Bernhard Runge, On Siegel modular forms, part II, Nagoya Math. J. 138, 179-197 (1995). FORMULA Oura gives an explicit formula for the Molien series. EXAMPLE 1+x^8+x^12+2*x^16+3*x^20+7*x^24+7*x^28+19*x^32+27*x^36+O(x^40). MATHEMATICA See link for Mathematica program. CROSSREFS Cf. A027633, A027638, A051354. Sequence in context: A171464 A276730 A179894 * A104138 A281909 A083809 Adjacent sequences:  A027669 A027670 A027671 * A027673 A027674 A027675 KEYWORD nonn,nice,easy AUTHOR STATUS approved

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Last modified September 24 04:27 EDT 2017. Contains 292403 sequences.